This is a 3.5 ounce aerosol spray can of Spaz Stix "Ultimate Black" Backer Spray Paint. Ultimate Black Backer is specially formulated for use with Spaz Stix Ultimate Mirror Chrome (SZX10009). Backing mirror chrome with the Ultimate Black Backer protects and permits the full reflective properties of the chrome. Can also be used as a backer for the Spaz Stix Color Change paints.